128. Mica is used in electrical appliances such as electric iron because mica is

A.a good conductor of heat but a bad conductor of electricity
B.a bad conductor of heat but a good conductor of electricity
C.a good conductor of heat as well as electricity
D.a bad conductor of heat as well as electricity

Answer: Option A- a good conductor of heat but a bad conductor of electricity

129. Minimum number of unequal vectors which can give zero resultant are

A. two
B. three
C. four
D. more than four

Answer: Option B- three

130. Which among the following is the surface to surface missile that is made in India?
a) Dharti
b) Akash
c) Prithivi
d) Naag